dlazure - Unfortunately, there is no hard reset button available on the NetVanta 3448.

Are you using a known working console cable? You will want to make sure that it is a straightthrough serial cable. The following link explains how you can test if the cable is good: Re: NetVanta 1234 Serial issue If you are able to get a console connection, then you will want to follow this guide to defaulting the 3448: Restoring an AOS Device to Factory Default

If you are still unable to console into the router, then you will want to call Adtran Technical Support for further troubleshooting. You can contact them in the following ways:

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